72.45% is the change from 323 to 557
Calculation steps:
[( 557 - 323 ) ÷ 323] x 100 = 72.45%
Formula
Percentage change = [(557 - 323) / 323] x 100
Subtract the new number by the original number
557 - 323 = 234
234 ÷ 323 = 0.7244582043343654
0.7244582043343654 x 100 = 72.45%